Saw-tooth.



@ummm o. M. D'ATT-ERWAY.

` SAW TOOTH.

APPLICATION lFILED Anaal. 1905.

UNITED` sTATEs PATENT OFFIOE. y

Speccation of Letters Patent.

Patented Oct. 2.3, 1906.

Application led August 31 1905-V Serial No. 276,597.

To all whom it may concern:

Be it known that I, CONRAD M. DATTER- WAY, a citizen of the UnitedStates, residing at Youngstown, in the county of Westmoreland and Stateof Pennsylvania, have invented certain new and useful Improvements inSaw-Teeth; and I do declare the following tO be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

`My invention relates to improvements in saws provided with removablesaw-teeth, the Object of my invention being to effect improvements inthe construction of the sawtooth and in the construction of the sawbladewhereby the tooth is firmly held in place and cannot become casuallydisengaged.

In the accompanying-drawings, Figure 1 is an elevation of a portion of asaw provided with a saw-tooth embod 'ng my improvements. Fig. 2 is adetai sectional view of the same, taken on the plane indicated by theline a a of Fig. 1.

The saw-blade 1 is provided with an Opening at its cutting edge tOprovide recesses for the reception of the detachable teeth and of thedevices for securing the teeth in place, one of thesaid recesses beingshown at 2. One portion 17 of the blade is provided with a tongue 4,which contacts with a groove 42 in one edge of the tooth 4, theperipheral portions of the blade and tooth forming a continuous curve.The edge 3 of the recess against which the tooth 4 abuts is providedwith a shoulder 5, and the tooth is provided with a projection toprovide a shoulder 6 to bear against the said shoulder 5 and lock thetooth against the longitudinal outward movement, so that the toothcannot become casually detached from the saw blade. Thev tooth has aconcave front edge 7 which is engaged by the convex edge 8 of the arm 9of end of the arm 15 of the the locking-piece 10, said arm beingprovided with an angular shoulder 9, formed by a continuation of theconvex face portion. The said locking-piece is of the form here shownand is provided with a curved portion 11 to fit in the similarly-shapedseat 12 at the angle between the edges 3 and 13 of the opening in thesaw-blade. The said Opening has a side 14, which converges outwardlytoward the side 3 and which is engaged by the outer iece 10. Alocking-rib 16 bears between t e arm 15 and the edge 13 Of the openingin the saw-blade and serves to securely hold the piece 10 in place andkeep the arm 9 thereof inv engagement with the concave front edge of thedetachable tooth.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is- A saw-blade having a recessedopening therein, a tooth therewith having a curved upper end and astraight lower end and having a concaved face portion and a grooved rearportion to engage a tongue on the upper end Of the blade, said toothbeing also provided with a projection at its lower end to form ashoulder to contact with a shoulder of the blade, a locking devicehaving a convex face portion to contact with the concave face portionOi' the tooth, a shoulder formed by a continuation of the convex facewhich serves to contact against the under face oi the tooth, means onsaid locking device connected to means on the blade, and a rib forsecuring the locking device against the tooth. l

In testimony whereof I have hereunto set' my hand in presence of twosubscribing witnesses.

l CONRAD M. DATTERWAY. Witnesses:

JOHN F. BUSCH, ANTHONEY DATTERWAY.

